Kakuro are easy to learn yet highly addictive language-independent logic puzzles now following the footsteps of the worldwide Sudoku success. Requiring just pure logic and simple add/subtract calculations, these numerical-crossword puzzles will carry you into a fascinating world of number combinations you never imagined could exist.
Best defined as number crosswords, Kakuro puzzles come in endless variations, are available in almost any grid size and range from very easy to extremely difficult taking anything from ten minutes to several hours to solve. Make one mistake and you’ll find yourself stuck later on as you get closer to the solution.
Each puzzle consists of a blank grid with sum-clues in various places. The object is to fill all empty squares using numbers 1 to 9 so the sum of each horizontal block equals the clue on its left, and the sum of each vertical block equals the clue on its top. In addition, no number may be used in the same block more than once.